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annotate src/platform/windows/win32.nim @ 5:4ed9cb098315

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add: structure code for crossplatform, add some input handling + bugfixes
author Sam <sam@basx.dev>
date Thu, 22 Dec 2022 00:06:40 +0700
parents
children 0660ba9d1930
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5
4ed9cb098315 add: structure code for crossplatform, add some input handling + bugfixes
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1 import winim
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2
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3 import ../../events
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4
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5 type
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6 NativeWindow* = object
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7 hinstance*: HINSTANCE
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8 hwnd*: HWND
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9
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10 template checkWin32Result*(call: untyped) =
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11 let value = call
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12 if value != 0:
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13 raise newException(Exception, "Win32 error: " & astToStr(call) & " returned " & $value)
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14
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15 proc WindowHandler(hwnd: HWND, uMsg: UINT, wParam: WPARAM, lParam: LPARAM): LRESULT {.stdcall.} =
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16 case uMsg
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17 of WM_DESTROY:
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18 discard
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19 else:
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20 return DefWindowProc(hwnd, uMsg, wParam, lParam)
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21
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22
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23 proc createWindow*(title: string): NativeWindow =
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24 result.hInstance = HINSTANCE(GetModuleHandle(nil))
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25 var
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26 windowClassName = T"EngineWindowClass"
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27 windowName = T(title)
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28 windowClass = WNDCLASS(
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29 lpfnWndProc: WindowHandler,
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30 hInstance: result.hInstance,
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31 lpszClassName: windowClassName,
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32 )
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33 RegisterClass(addr(windowClass))
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34
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35 result.hwnd = CreateWindowEx(
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36 DWORD(0),
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37 windowClassName,
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38 windowName,
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39 DWORD(WS_OVERLAPPEDWINDOW),
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40 CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
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41 HMENU(0),
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42 HINSTANCE(0),
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43 result.hInstance,
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44 nil
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45 )
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46
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47 discard ShowWindow(result.hwnd, 0)
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48
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49 proc trash*(window: NativeWindow) =
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50 PostQuitMessage(0)
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51
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52 proc size*(window: NativeWindow): (int, int) =
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53 var rect: RECT
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54 checkWin32Result GetWindowRect(window.hwnd, addr(rect))
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55 (int(rect.right - rect.left), int(rect.bottom - rect.top))
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56
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57 proc pendingEvents*(window: NativeWindow): seq[Event] =
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58 result